Re: Multiple overlays on contour map

Hi Seth,

I guess the netcdf files containing the 'boundaries of several subregions'
have the lat-lon points along these boundaries. In this case,
you can check out the examples related to polygons,poylines etc and use
gsn_add_polygon kind of functions.

Otherwise, you can simply try the 'overlay' procedure .

cheers,
saji

On Tue, Aug 17, 2010 at 3:56 PM, Seth McGinnis <mcginnis@ucar.edu> wrote:

> Example 2 on the "Contours overlaid on contours" page on the NCL website
> shows
> how to use gsn_csm_contour_map_overlay to plot two sets of contours on a
> map.
>
> Is there a way to overlay three or more sets of contours on a map? The
> function takes two sets of data, rather than one set of data and an
> existing
> graphic, so I don't see any way to chain it.
>
> I want to fill-contour some topographic data and then overplot the
> boundaries
> of several sub-regions, each of which is defined by its own netcdf mask
> file.
> The regions don't overlap, so I suppose I could add the masks together and
> overplot their union, but I was wondering if there was a more loop-oriented
> way
> to do it.
>
> Thanks!
>
> --Seth McGinnis
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Received on Tue Aug 17 06:45:33 2010